First planet to be discovered with alien ruins (discovered in 1615 A.T.)

The traces of a preindustrial stone-carving society stimulated scientific debate and religious cults. Debates centered on whether it was evidence of a pre-technological stone-carving society (as the scientists saw it) or, as many cultists believed, a center of cosmic energy and vibration. In any case, although no living aliens have yet been met, the discovery of ruins and artifacts such as this excited tremendous interest.